stripped down sparc.c

sparc.c (text/plain), 2.87 KB, created by Ferris McCormick (RETIRED) on 2003-04-25 08:28:28 UTC

/*
 * Mesa 3-D graphics library
 * Version:  4.0.3
 * 
 * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * Sparc assembly code by David S. Miller
 */

#include "context.h"
#include "math/m_vertices.h"
#include "math/m_xform.h"
#include "tnl/t_context.h"
#include "sparc.h"

#ifdef DEBUG
#include "math/m_debug.h"
#endif
#ifndef  IN_GLX
/* Lots of code removed for readability */
#endif  /* Don't do if IN_GLX */
extern unsigned int _mesa_sparc_glapi_begin;
extern unsigned int _mesa_sparc_glapi_end;
extern void __glapi_sparc_icache_flush(unsigned int *);

void _glx_mesa_init_sparc_glapi_relocs(void)
{
#ifdef  USE_SPARC_ASM
#define M1	( (1 << 10) - 1)
#define M2	(~M1)
	unsigned int *insn_ptr, *end_ptr;
	unsigned long disp_addr;

	insn_ptr = &_mesa_sparc_glapi_begin;
	end_ptr = &_mesa_sparc_glapi_end;
	disp_addr = (unsigned long) &_glapi_Dispatch;

	while (insn_ptr < end_ptr) {
#if 0	
/*
	This code patches for 64-bit addresses.  This had better
	not happen for Sparc/Linux, no matter what architecture we
	are building for.  So, don't do this.
	*/
		insn_ptr[0] |= (disp_addr >> (32 + 10));
		insn_ptr[1] |= ((disp_addr & 0xffffffff) >> 10);
		__glapi_sparc_icache_flush(&insn_ptr[0]);
		insn_ptr[2] |= ((disp_addr >> 32) & ((1 << 10) - 1));
		insn_ptr[3] |= (disp_addr & ((1 << 10) - 1));
		__glapi_sparc_icache_flush(&insn_ptr[2]);
		insn_ptr += 11;
#else
	/*
	  I think this might get called more than once.  So, don't
	  just -or- in the table address, but instead mask out any possible
	  previous table residue.
	  */
		/*
		insn_ptr[0] |= (disp_addr >> 10);
		*/
		insn_ptr[0]  =  ( (insn_ptr[0]) & M2 )  | (disp_addr >> 10);
		/*
		insn_ptr[1] |= (disp_addr & ((1 << 10) - 1));
		*/
		insn_ptr[1]  =  ( (insn_ptr[1]) & M2 )  | (disp_addr &  M1);
		__glapi_sparc_icache_flush(&insn_ptr[0]);
		insn_ptr += 5;
#endif
#endif  /* sparc ASM in use */
	}
}